im thinking the compression is up even without a zero deck, the heads displace the 64 cc chambers so 9to 1 is a given. I say near or at 400 hp 450 ft pounds is a given on this combo.
Couldnt give exact dyno but this is my educated geuss (estimate) with the combo listed
peak hp = 390 to 400 hp@ 5500 to 5800 rpms
peak tq = 400 to 450 @ 3500 rpms. Hope this helps.